Create joint success with large banks (6)
I believe the answer is:
couple
'create joint' is the definition.
I can't tell whether this definition defines the answer.
'success with large banks' is the wordplay.
'success' becomes 'coup' (I've seen this before).
'with' says to put letters next to each other.
'banks' says to hollow out the word (remove centre letters) (the sides or banks of the word).
'large' with its centre taken out is 'le'.
'coup'+'le'='COUPLE'
Can you help me to learn more?
(Other definitions for couple that I've seen before include "Duo, brace" , "item" , "Bonnie and Clyde, say" , "Pair, duo" , "Two of a kind" .)